Patents by Inventor John M. Safran

John M. Safran has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10794948
    Abstract: An EM testing method includes forcing electrical current through EM monitor wiring arranged in close proximity to the perimeter of the TSV and measuring an electrical resistance drop across the EM monitor wiring. The method may further include determining if an electrical short exists between the EM monitor wiring and the TSV from the measured electrical resistance. The method may further include determining if an early electrical open or resistance increase exists within the EM monitoring wiring due to TSV induced proximity effect.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: October 6, 2020
    Assignee: International Business Machines Corporation
    Inventors: Fen Chen, Mukta G. Farooq, John A. Griesemer, Chandrasekaran Kothandaraman, John M. Safran, Timothy D. Sullivan, Ping-Chuan Wang, Lijuan Zhang
  • Patent number: 10677833
    Abstract: A structure, such as a wafer, semiconductor chip, integrated circuit, or the like, includes a through silicon via (TSV) and an electromigration (EM) monitor. The TSV) includes at least one perimeter sidewall. The EM monitor includes a first EM wire separated from the perimeter sidewall of the TSV by a dielectric.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: June 9, 2020
    Assignee: International Business Machines Corporation
    Inventors: Fen Chen, Mukta G. Farooq, John A. Griesemer, Chandrasekaran Kothandaraman, John M. Safran, Timothy D. Sullivan, Ping-Chuan Wang, Lijuan Zhang
  • Patent number: 10446484
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to Through-Silicon Via (TSV) structures with improved substrate contact and methods of manufacture. The structure includes: a substrate of a first species type; a layer of different species type on the substrate; a through substrate via formed through the substrate and comprising an insulator sidewall and conductive fill material; a second species type adjacent the through substrate via; a first contact in electrical contact with the layer of different species type; and a second contact in electrical contact with the conductive fill material of the through substrate via.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: October 15, 2019
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: John M. Safran, Jochonia N. Nxumalo, Joyce C. Liu, Sami Rosenblatt, Chandrasekharan Kothandaraman
  • Publication number: 20180166381
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to Through-Silicon Via (TSV) structures with improved substrate contact and methods of manufacture. The structure includes: a substrate of a first species type; a layer of different species type on the substrate; a through substrate via formed through the substrate and comprising an insulator sidewall and conductive fill material; a second species type adjacent the through substrate via; a first contact in electrical contact with the layer of different species type; and a second contact in electrical contact with the conductive fill material of the through substrate via.
    Type: Application
    Filed: November 2, 2017
    Publication date: June 14, 2018
    Inventors: John M. SAFRAN, Jochonia N. NXUMALO, Joyce C. LIU, Sami ROSENBLATT, Chandrasekharan KOTHANDARAMAN
  • Patent number: 9953900
    Abstract: Device structures involving a conductor-filled via or trench, methods of forming such device structures, and methods of operating such device structures. A doped region is formed in the substrate. An opening, such as a via or trench, is formed that extends through the doped region and into a portion of the substrate beneath the doped region. A conductive plug in formed in the opening to provide the conductor-filled via or trench. The opening is positioned and dimensioned relative to a position and dimensions of the doped region to divide the doped region into a first section and a second section that is disconnected from the first section by the opening.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: April 24, 2018
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: John M. Safran, Sami Rosenblatt, Michael S. Cranmer, Chandrasekharan Kothandaraman
  • Publication number: 20180074110
    Abstract: An EM testing method includes forcing electrical current through EM monitor wiring arranged in close proximity to the perimeter of the TSV and measuring an electrical resistance drop across the EM monitor wiring. The method may further include determining if an electrical short exists between the EM monitor wiring and the TSV from the measured electrical resistance. The method may further include determining if an early electrical open or resistance increase exists within the EM monitoring wiring due to TSV induced proximity effect.
    Type: Application
    Filed: November 7, 2017
    Publication date: March 15, 2018
    Inventors: Fen Chen, Mukta G. Farooq, John A. Griesemer, Chandrasekaran Kothandaraman, John M. Safran, Timothy D. Sullivan, Ping-Chuan Wang, Lijuan Zhang
  • Publication number: 20180074111
    Abstract: A structure, such as a wafer, semiconductor chip, integrated circuit, or the like, includes a through silicon via (TSV) and an electromigration (EM) monitor. The TSV) incldues at least one perimeter sidewall.
    Type: Application
    Filed: November 7, 2017
    Publication date: March 15, 2018
    Inventors: Fen Chen, Mukta G. Farooq, John A. Griesemer, Chandrasekaran Kothandaraman, John M. Safran, Timothy D. Sullivan, Ping-Chuan Wang, Lijuan Zhang
  • Patent number: 9891261
    Abstract: A structure, such as a wafer, chip, IC, design structure, etc., includes a through silicon via (TSV) and an electromigration (EM) monitor. The TSV extends completely through a semiconductor chip and the EM monitor includes a plurality of EM wires proximately arranged about the TSV perimeter. An EM testing method includes forcing electrical current through EM monitor wiring arranged in close proximity to the perimeter of the TSV, measuring an electrical resistance drop across the EM monitor wiring, determining if an electrical short exists between the EM monitor wiring and the TSV from the measured electrical resistance, and/or determining if an early electrical open or resistance increase exists within the EM monitoring wiring due to TSV induced proximity effect.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: February 13, 2018
    Assignee: International Business Machines Corporation
    Inventors: Fen Chen, Mukta G. Farooq, John A. Griesemer, Chandrasekaran Kothandaraman, John M. Safran, Timothy D. Sullivan, Ping-Chuan Wang, Lijuan Zhang
  • Patent number: 9847290
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to Through-Silicon Via (TSV) structures with improved substrate contact and methods of manufacture. The structure includes: a substrate of a first species type; a layer of different species type on the substrate; a through substrate via formed through the substrate and comprising an insulator sidewall and conductive fill material; a second species type adjacent the through substrate via; a first contact in electrical contact with the layer of different species type; and a second contact in electrical contact with the conductive fill material of the through substrate via.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: December 19, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: John M. Safran, Jochonia N. Nxumalo, Joyce C. Liu, Sami Rosenblatt, Chandrasekharan Kothandaraman
  • Publication number: 20170287812
    Abstract: Device structures involving a conductor-filled via or trench, methods of forming such device structures, and methods of operating such device structures. A doped region is formed in the substrate. An opening, such as a via or trench, is formed that extends through the doped region and into a portion of the substrate beneath the doped region. A conductive plug in formed in the opening to provide the conductor-filled via or trench. The opening is positioned and dimensioned relative to a position and dimensions of the doped region to divide the doped region into a first section and a second section that is disconnected from the first section by the opening.
    Type: Application
    Filed: March 29, 2016
    Publication date: October 5, 2017
    Inventors: John M. Safran, Sami Rosenblatt, Michael S. Cranmer, Chandrasekharan Kothandaraman
  • Publication number: 20160148863
    Abstract: A three-dimensional (3-D) integrated circuit wiring including a plurality of stacked dielectric levels formed on a substrate includes a plurality of non-contiguous dummy walls patterned in a corresponding dielectric level around a circuit wire keep out zone (KOZ). The non-contiguous dummy walls are formed in the circuit wire KOZ and have an outer side and an opposing inner side that extend along a first direction to define a length. A circuit wire segment is located at a first metal level and a second circuit wire segment is located at a second metal level different from the first metal level. The first and second metal levels are located adjacent the inner side of at least one non-contiguous dummy wall.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 26, 2016
    Inventors: Fen Chen, Mukta G. Farooq, John M. Safran
  • Publication number: 20150380326
    Abstract: A structure, such as a wafer, chip, IC, design structure, etc., includes a through silicon via (TSV) and an electromigration (EM) monitor. The TSV extends completely through a semiconductor chip and the EM monitor includes a plurality of EM wires proximately arranged about the TSV perimeter. An EM testing method includes forcing electrical current through EM monitor wiring arranged in close proximity to the perimeter of the TSV, measuring an electrical resistance drop across the EM monitor wiring, determining if an electrical short exists between the EM monitor wiring and the TSV from the measured electrical resistance, and/or determining if an early electrical open or resistance increase exists within the EM monitoring wiring due to TSV induced proximity effect.
    Type: Application
    Filed: June 30, 2014
    Publication date: December 31, 2015
    Inventors: Fen Chen, Mukta G. Farooq, John A. Griesemer, Chandrasekaran Kothandaraman, John M. Safran, Timothy D. Sullivan, Ping-Chuan Wang, Lijuan Zhang
  • Patent number: 9177923
    Abstract: A semiconductor apparatus includes a substrate structure including a silicon substrate layer, a conductive through-substrate via extending through the silicon substrate layer. The apparatus further includes a semiconductor device located in the substrate structure and a conductive wall located between the through-substrate via and the semiconductor device. The conductive wall is in electrical contact with the silicon substrate layer.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: November 3, 2015
    Assignee: International Business Machines Corporation
    Inventors: Daeik Kim, Chandrasekharan Kothandaraman, Chung-Hsun Lin, John M. Safran
  • Patent number: 9070698
    Abstract: A semiconductor apparatus includes a substrate structure including a silicon substrate layer, a conductive through-substrate via extending through the silicon substrate layer. The apparatus further includes a semiconductor device located in the substrate structure and a conductive wall located between the through-substrate via and the semiconductor device. The conductive wall is in electrical contact with the silicon substrate layer.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: June 30, 2015
    Assignee: International Business Machines Corporation
    Inventors: Daeik Kim, Chandrasekharan Kothandaraman, Chung-Hsun Lin, John M. Safran
  • Publication number: 20150035589
    Abstract: A semiconductor apparatus includes a substrate structure including a silicon substrate layer, a conductive through-substrate via extending through the silicon substrate layer. The apparatus further includes a semiconductor device located in the substrate structure and a conductive wall located between the through-substrate via and the semiconductor device. The conductive wall is in electrical contact with the silicon substrate layer.
    Type: Application
    Filed: October 21, 2014
    Publication date: February 5, 2015
    Inventors: Daeik Kim, Chandrasekharan Kothandaraman, Chung-Hsun Lin, John M. Safran
  • Publication number: 20140118059
    Abstract: A semiconductor apparatus includes a substrate structure including a silicon substrate layer, a conductive through-substrate via extending through the silicon substrate layer. The apparatus further includes a semiconductor device located in the substrate structure and a conductive wall located between the through-substrate via and the semiconductor device. The conductive wall is in electrical contact with the silicon substrate layer.
    Type: Application
    Filed: November 1, 2012
    Publication date: May 1, 2014
    Applicant: International Business Machines Corporation
    Inventors: Daeik Kim, Chandrasekharan Kothandaraman, Chung-Hsun Lin, John M. Safran
  • Patent number: 8629049
    Abstract: A fabrication method for fabricating an electrically programmable fuse method includes depositing a polysilicon layer on a substrate, patterning an anode contact region, a cathode contact region and a fuse link conductively connecting the cathode contact region with the anode contact region, which is programmable by applying a programming current, depositing a silicide layer on the polysilicon layer, and forming a plurality of anisometric contacts on the silicide layer of the cathode contact region and the anode contact region in a predetermined configuration, respectively.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: January 14, 2014
    Assignee: International Business Machines Corporation
    Inventors: Chandrasekharan Kothandaraman, Dan Moy, Norman W. Robson, John M. Safran
  • Patent number: 8569755
    Abstract: An antifuse has first and second semiconductor regions having one conductivity type and a third semiconductor region therebetween having an opposite conductivity type. A conductive region contacting the first region has a long dimension in a second direction transverse to the direction of a long dimension of a gate. An antifuse anode is spaced apart from the first region in the second direction and a contact is connected with the second region. Applying a programming voltage between the anode and the contact with gate bias sufficient to fully turn on field effect transistor operation of the antifuse heats the first region to drive a dopant outwardly, causing an edge of the first region to move closer to an edge of the second region and reduce electrical resistance between the first and second regions by an one or more orders of magnitude.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: October 29, 2013
    Assignee: International Business Machines Corporation
    Inventors: Yan Zun Li, Chandrasekharan Kothandaraman, Dan Moy, Norman W. Robson, John M. Safran
  • Patent number: 8519507
    Abstract: An electrically programmable fuse that includes an anode contact region and a cathode contact region are formed of a polysilicon layer having a silicide layer formed thereon, and a fuse link conductively connecting the cathode contact region with the anode contact region, which is programmable by applying a programming current, and a plurality of anisometric contacts formed on the silicide layer of the cathode contact region or on both the silicide layer of the cathode contact region and the anode contact region in a predetermined configuration, respectively.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: August 27, 2013
    Assignee: International Business Machines Corporation
    Inventors: Chandrasekharan Kothandaraman, Dan Moy, Norman W. Robson, John M. Safran
  • Publication number: 20130063202
    Abstract: An antifuse has first and second semiconductor regions having one conductivity type and a third semiconductor region therebetween having an opposite conductivity type. A conductive region contacting the first region has a long dimension in a second direction transverse to the direction of a long dimension of a gate. An antifuse anode is spaced apart from the first region in the second direction and a contact is connected with the second region. Applying a programming voltage between the anode and the contact with gate bias sufficient to fully turn on field effect transistor operation of the antifuse heats the first region to drive a dopant outwardly, causing an edge of the first region to move closer to an edge of the second region and reduce electrical resistance between the first and second regions by an one or more orders of magnitude.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 14, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Yan Zun Li, Chandrasekharan Kothandaraman, Dan Moy, Norman W. Robson, John M. Safran